"Search giant Google, facing a broad antitrust probe into its business practices, has hired 12 lobbying firms, a spokeswoman from the company said on Friday. The Federal Trade Commission, which investigates violations of antitrust law, is expected to look into complaints that Google's search results favor the company's other services, among other issues. Google, which runs an estimated 69 percent of Web searches worldwide, can make or break a company depending on its search ranking."

My understanding is it is not the search that is the issue. It is peoples/companies perceived ranking in the searches that they say Google is manipulating due to "Market Dominance" and placing Google products higher in the ranking.